Thanks for posting this info. I should have checked those old maps when I was exploring the area. I'd have checked out that trail then. Good excuse to go back, it's an interesting area.
I hiked south on the 406 road to it's end back then, but did not see any continuation. But then, I didn't look very hard, either. BTW, the 406 road was entirely drivable except for a small rockslide directly east of Lookout Mt. I could have crossed it in my SUV in the downhill direction but wasn't sure I'd be able to get back in the uphill direction. It was just a little too risky. I don't know if that's been fixed by now.
I was in the area last weekend and road 41 is still blocked by snow in places. I think I'll head out , maybe tomorrow and try to hike it from the south side.